Cobra BMW F40 M135i xDrive GPF / PPF Back Race Box Delete Performance Exhaust
Upgrade the sound and presence of your BMW M135i F40 M135ix with the Cobra Sport GPF-back exhaust system. This performance exhaust uses 3 inch 76.2 mm pipework and fits from the Gasoline Particulate Filter backwards, replacing the centre and rear sections for a true rear box delete. Keep your factory catalyst and GPF in place while unleashing a deeper, louder, more aggressive tone that transforms every drive.
Built to deliver a significant improvement in exhaust tone, bass and sound level, this Cobra Sport GPF-back system is a direct replacement for the OEM centre and rear sections and comes with all required fittings and gaskets supplied. Choose between valved and non-valved configurations and finish it off with your preferred 4 inch or 4.5 inch tailpipes, including premium carbon fibre options.
Why choose this BMW M135i F40 GPF-back exhaust
- 3 inch 76.2 mm GPF-back performance exhaust for BMW 1 Series F40 M135i xDrive M135ix
- Race box delete design removes the rear silencer for a true rear box delete and enhanced sound
- Substantial sound increase while retaining the stock catalyst and GPF
- Valved option retains factory valve control via drive modes for quiet to loud behaviour
- Non-valved option delivers a consistently sportier, louder exhaust note
- Multiple 4 inch and 4.5 inch tailpipe choices including carbon fibre
- All required fittings and gaskets supplied for installation
- Backed by Cobra Sport Lifetime Warranty non-transferable
Sound testing results
GPF-back with Box Delete
- Engine at idle: 73.5 dB +10.5 dB over stock
- Static at 3,800 rpm: 95.1 dB +13.1 dB over stock
Valved vs non-valved
Valved retains the OEM valve control. Switching drive modes for example Eco to Sport adjusts the tone from quieter to louder as normal.
Non-valved removes the valve control. Switching drive modes will not change exhaust loudness. This will not harm the running of the vehicle and the system has been designed accordingly.
Tailpipe options
- TP19 - 4.5 inch Chrome Tailpipe
- TP38 - 4 inch Chrome Inverted Tailpipe
- TP106-CF - 4.5 inch Slash Cut Carbon Fibre Tailpipe
- TP107-CF - 4 inch Slash Cut Carbon Fibre Tailpipe
Compatibility
BMW 1 Series F40 M135ix 2018 - 2019
Part numbers
- BM129TP19 Valved - TP19
- BM121TP19 Non-Valved - TP19
- BM129TP38 Valved - TP38
- BM121TP38 Non-Valved - TP38
- BM129TP106-CF Valved - TP106-CF
- BM121TP106-CF Non-Valved - TP106-CF
- BM129TP107-CF Valved - TP107-CF
- BM121TP107-CF Non-Valved - TP107-CF
Manufacturer and warranty
Manufactured by: Cobra Sport
Warranty: Cobra Lifetime Warranty non-transferable
Professional fitting
We recommend professional installation for the best result. Book fitting with Nforcd in Warwickshire. Request a quote at Sales@nforcd.com.
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